Boston Marathon logo
BOSTON MARATHON 2025

Olivia Szeto

Bib: 25934•F

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:16
Rank: #21396
Start → 5K
27:16 | 8:47/mi
10K· 6.21 mi
54:22
Rank: #21175 (+221)
5K → 10K
27:06 | 8:43/mi
15K· 9.32 mi
1:22:15
Rank: #21398 (-223)
10K → 15K
27:53 | 8:58/mi
20K· 12.43 mi
1:53:34
Rank: #22517 (-1119)
15K → 20K
31:19 | 10:05/mi
Half· 13.11 mi
2:00:02
Rank: #22601 (-84)
20K → Half
6:28 | 9:29/mi
25K· 15.53 mi
2:25:58
Rank: #23112 (-511)
Half → 25K
25:56 | 10:42/mi
30K· 18.64 mi
2:59:08
Rank: #23115 (-3)
25K → 30K
33:10 | 10:41/mi
20M
3:14:42
Rank: #23245 (-130)
30K → 20M
15:34 | 11:27/mi
21M
3:27:12
Rank: #23328 (-83)
20M → 21M
12:30 | 12:30/mi
35K· 21.75 mi
3:35:46
Rank: #23409 (-81)
21M → 35K
8:34 | 11:27/mi
23M
3:51:01
Rank: #23595 (-186)
35K → 23M
15:15 | 12:11/mi
24M
4:02:12
Rank: #23646 (-51)
23M → 24M
11:11 | 11:11/mi
40K· 24.85 mi
4:13:00
Rank: #23761 (-115)
24M → 40K
10:48 | 12:38/mi
25.2M
4:17:35
Rank: #23799 (-38)
40K → 25.2M
4:35 | 13:17/mi
Finish· 26.22 mi
4:27:28
Rank: #23760 (+39)
25.2M → Finish
9:53 | 9:42/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:02
Pace9:09 /mi
2nd Half
Distance13.11 mi
Time2:27:26
Pace11:15 /mi
📊Positive Split: 22.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:4127:168:4727:16
8:47
-
10K
6.21 mi12:20:4754:228:4527:06
8:43
-0:04
15K
9.32 mi12:48:401:22:158:4927:53
8:58
+0:15
20K
12.43 mi13:19:591:53:349:0831:19
10:05
+1:07
Half
13.11 mi13:26:272:00:029:096:28
9:29
-0:36
25K
15.53 mi13:52:232:25:589:2425:56
10:42
+1:13
30K
18.64 mi14:25:332:59:089:3733:10
10:41
-0:01
20M
20.00 mi14:41:073:14:429:4415:34
11:27
+0:46
21M
21.00 mi14:53:373:27:129:5212:30
12:30
+1:03
35K
21.75 mi15:02:113:35:469:558:34
11:27
-1:03
23M
23.00 mi15:17:263:51:0110:0315:15
12:11
+0:44
24M
24.00 mi15:28:374:02:1210:0611:11
11:11
-1:00
40K
24.85 mi15:39:254:13:0010:1110:48
12:38
+1:27
25.2M
25.20 mi15:44:004:17:3510:134:35
13:17
+0:39
Finish
26.22 mi15:53:534:27:2810:139:53
9:42
-3:35

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:43 /mi

Average Pace

10:13 /mi

Slowest Pace

13:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:36

37% of race

Time at Steady Pace

1:41:36

38% of race

Time at Slower Pace

1:07:16

25% of race

Average Pace: 10:12 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:53:4127:168:4727:16
8:47
#21396
10K
6.21 mi12:20:4754:228:4527:06
8:43
#21175
15K
9.32 mi12:48:401:22:158:4927:53
8:58
#21398
20K
12.43 mi13:19:591:53:349:0831:19
10:05
#22517
Half
13.11 mi13:26:272:00:029:096:28
9:29
#22601
25K
15.53 mi13:52:232:25:589:2425:56
10:42
#23112
30K
18.64 mi14:25:332:59:089:3733:10
10:41
#23115
20M
20.00 mi14:41:073:14:429:4415:34
11:27
#23245
21M
21.00 mi14:53:373:27:129:5212:30
12:30
#23328
35K
21.75 mi15:02:113:35:469:558:34
11:27
#23409
23M
23.00 mi15:17:263:51:0110:0315:15
12:11
#23595
24M
24.00 mi15:28:374:02:1210:0611:11
11:11
#23646
40K
24.85 mi15:39:254:13:0010:1110:48
12:38
#23761
25.2M
25.20 mi15:44:004:17:3510:134:35
13:17
#23799
Finish
26.22 mi15:53:534:27:2810:139:53
9:42
#23760
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi213968300830021939(Top 77%)8518(Top 70%)8518(Top 156%)
10K6.21 mi3.10 mi21175+2218149+1518149+15121022(Top 74%)8031(Top 66%)8031(Top 147%)
15K9.32 mi3.11 mi21398-2238250-1018250-10121939(Top 77%)8518(Top 70%)8518(Top 156%)
20K12.43 mi3.11 mi22517-11198874-6248874-62424409(Top 86%)9937(Top 81%)9937(Top 182%)
Half13.11 mi0.68 mi22601-848909-358909-3523540(Top 83%)9454(Top 77%)9454(Top 173%)
25K15.53 mi2.42 mi23112-5119203-2949203-29424714(Top 87%)10139(Top 83%)10139(Top 185%)
30K18.64 mi3.11 mi23115-39251-489251-4823337(Top 82%)9516(Top 78%)9516(Top 174%)
20M20.00 mi1.36 mi23245-1309338-879338-8724464(Top 86%)10203(Top 83%)10203(Top 187%)
21M21.00 mi1.00 mi23328-839404-669404-6624410(Top 86%)10242(Top 84%)10242(Top 187%)
35K21.75 mi0.75 mi23409-819461-579461-5725030(Top 88%)10599(Top 87%)10599(Top 194%)
23M23.00 mi1.25 mi23595-1869578-1179578-11725371(Top 89%)10789(Top 88%)10789(Top 197%)
24M24.00 mi1.00 mi23646-519624-469624-4624367(Top 86%)10307(Top 84%)10307(Top 188%)
40K24.85 mi0.85 mi23761-1159699-759699-7525843(Top 91%)11060(Top 90%)11060(Top 202%)
25.2M25.20 mi0.35 mi23799-389725-269725-2625426(Top 90%)10897(Top 89%)10897(Top 199%)
Finish26.22 mi1.02 mi23760+399711+149711+1421943(Top 77%)9134(Top 75%)9134(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

21939

Females

8518

F18-39

8518

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

21022

Females

8031

F18-39

8031

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

21939

Females

8518

F18-39

8518

15K→20K

9.3 - 12.4 mi

Top 86%
×5stories
+106ft-86ft

Overall

24409

Females

9937

F18-39

9937

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

23540

Females

9454

F18-39

9454

Half→25K

13.1 - 15.5 mi

Top 87%
×4stories
+66ft-88ft

Overall

24714

Females

10139

F18-39

10139

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23337

Females

9516

F18-39

9516

30K→20M

18.6 - 20.0 mi

Top 86%
×5stories
+64ft-50ft

Overall

24464

Females

10203

F18-39

10203

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

24410

Females

10242

F18-39

10242

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

25030

Females

10599

F18-39

10599

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

25371

Females

10789

F18-39

10789

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

24367

Females

10307

F18-39

10307

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

25843

Females

11060

F18-39

11060

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

25426

Females

10897

F18-39

10897

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21943

Females

9134

F18-39

9134

Passing Analysis

Category:
Athletes Passed
1047
Passed By
3411
Net Change
-2364
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21396
5K → 10K406185+221#21396#21175
10K → 15K141364-223#21175#21398
15K → 20K271146-1119#21398#22517
20K → Half1498-84#22517#22601
Half → 25K37548-511#22601#23112
25K → 30K174177-3#23112#23115
30K → 20M44174-130#23115#23245
20M → 21M36119-83#23245#23328
21M → 35K26107-81#23328#23409
35K → 23M28214-186#23409#23595
23M → 24M3283-51#23595#23646
24M → 40K20135-115#23646#23761
40K → 25.2M543-38#23761#23799
25.2M → Finish5718+39#23799#23760
TOTALS10473411-2364
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing